This website's content is no longer actively maintained, but the material has been kept on-line for historical purposes.
The page may contain broken links or outdated information, and parts may not function in current web browsers.

Please note that ISCCP data processing is now performed at NOAA/NCEI.
Please visit the NOAA/NCEI website for access to ISCCP H data products and other up-to-date information.

Calibration Coefficients NOAA-9

NOAA-9 Normalized and Absolute calibration coefficients for VIS scaled radiance (0 to 1, AVHRR Channel 1). The Absolute coefficients combine all ISCCP calibration adjustments, including the aircraft calibration.

---------------------------------------------------------
  DATE     NORMALIZATION    ABSOLUTE     TOTAL CORRECTION
YYYYMMDD   Slope   Intc   Slope   Intc     Slope   Intc  
--------   -------------  -------------  ----------------

19850228  0.835   0.002   1.192  -0.001   0.995   0.001
19850331  0.838   0.002   1.193  -0.001   1.000   0.001
19850430  0.841   0.002   1.195  -0.001   1.005   0.001
19850531  0.844   0.002   1.196  -0.001   1.009   0.001
19850630  0.848   0.002   1.198  -0.001   1.016   0.001
19850731  0.850   0.002   1.199  -0.001   1.019   0.001
19850831  0.853   0.002   1.201  -0.001   1.024   0.001
19850930  0.857   0.002   1.202  -0.001   1.030   0.001
19851031  0.859   0.002   1.204  -0.001   1.034   0.001
19851130  0.863   0.002   1.205  -0.001   1.040   0.001
19851231  0.866   0.002   1.207  -0.001   1.045   0.001
19860131  0.869   0.002   1.208  -0.001   1.050   0.001
19860228  0.872   0.002   1.210  -0.001   1.055   0.001
19860331  0.875   0.002   1.212  -0.001   1.060   0.001
19860430  0.878   0.002   1.213  -0.001   1.065   0.001
19860531  0.882   0.002   1.215  -0.001   1.072   0.001
19860630  0.885   0.002   1.216  -0.001   1.076   0.001
19860731  0.888   0.002   1.218  -0.001   1.082   0.001
19860831  0.891   0.002   1.219  -0.001   1.086   0.001
19860930  0.894   0.002   1.221  -0.001   1.092   0.001
19861031  0.898   0.002   1.222  -0.001   1.097   0.001
19861130  0.901   0.002   1.224  -0.001   1.103   0.001
19861231  0.904   0.002   1.225  -0.001   1.107   0.001
19870131  0.908   0.002   1.227  -0.001   1.114   0.001
19870228  0.911   0.002   1.228  -0.001   1.119   0.001
19870331  0.914   0.002   1.230  -0.001   1.124   0.001
19870430  0.918   0.002   1.231  -0.001   1.130   0.001
19870531  0.921   0.002   1.233  -0.001   1.136   0.001
19870630  0.924   0.002   1.234  -0.001   1.140   0.001
19870731  0.928   0.002   1.236  -0.001   1.147   0.001
19870831  0.931   0.002   1.238  -0.001   1.153   0.001
19870930  0.934   0.002   1.239  -0.001   1.157   0.001
19871031  0.938   0.002   1.241  -0.001   1.164   0.001
19871130  0.941   0.002   1.242  -0.001   1.169   0.001
19871231  0.944   0.002   1.244  -0.001   1.174   0.001
19880131  0.948   0.002   1.245  -0.001   1.180   0.001
19880229  0.951   0.002   1.247  -0.001   1.186   0.001
19880331  0.954   0.002   1.248  -0.001   1.191   0.001
19880430  0.958   0.002   1.250  -0.001   1.198   0.002
19880531  0.961   0.002   1.252  -0.001   1.203   0.002
19880630  0.965   0.002   1.253  -0.001   1.209   0.002
19880731  0.969   0.002   1.255  -0.001   1.216   0.002
19880831  0.972   0.002   1.256  -0.001   1.221   0.002
19880930  0.975   0.002   1.258  -0.001   1.227   0.002
19881031  0.979   0.002   1.259  -0.001   1.233   0.002
---------------------------------------------------------

NOAA-9: Normalized and Absolute calibration coefficients for IR brightness temperature in Kelvin (AVHRR Channel 4). The Absolute coefficients combine all ISCCP calibration adjustments, including the aircraft calibration.

---------------------------------------------------------
  DATE     NORMALIZATION    ABSOLUTE     TOTAL CORRECTION
YYYYMMDD   Slope   Intc   Slope   Intc     Slope   Intc  
--------   -------------  -------------  ----------------

19850228   1.000   0.000   1.000   0.000   1.000   0.000
    :        :       :      :       :        :       :   
19861031   1.028  -8.500   1.000   0.000   1.028  -8.500
    :        :       :      :       :        :       :   
19861130   1.000   0.000   1.000   0.000   1.000   0.000
    :        :       :      :       :        :       :   
19870331   1.038 -11.500   1.000   0.000   1.038 -11.500
    :        :       :      :       :        :       :   
19870430   1.000   0.000   1.000   0.000   1.000   0.000
    :        :       :      :       :        :       :   
19871031   1.038 -11.500   1.000   0.000   1.038 -11.500
    :        :       :      :       :        :       :   
19881031   1.038 -11.500   1.000   0.000   1.038 -11.500
---------------------------------------------------------

ISCCP Calibration Coefficients